6.条件渲染v-if、监听键盘事件$event

<template>
  <div id="app">
    <!-- 监听键盘事件 -->
    <input type="text" v-model="todo" @keydown="AddText($event)">
    
    <br>
    <hr>

    <h2>未完成</h2>
    <ul>
      <li v-for="(item,index) in list" :key="index">
        <div v-if="!item.checkbox">
          <input type="checkbox" v-model="item.checkbox"> {{item.title}}---<button @click="RemoveText(index)">删除</button>
        </div>
      </li>
    </ul>
    <h2>已完成</h2>
    <ul>
      <li v-for="(item,index) in list" :key="index" class="finish">
        <div v-if="item.checkbox">
          <input type="checkbox" v-model="item.checkbox"> {{item.title}}---<button @click="RemoveText(index)">删除</button>
        </div>
      </li>
    </ul>
  
  </div>
</template>
<script>
export default {
  name: 'app',
  data () {
    return { 
      todo:'',
      list:[],
    }
  },
  methods:{
    AddText(e){
      console.log(e.keyCode)
      // 如果点击回车键
      if(e.keyCode==13){
        this.list.push({title:this.todo,checkbox:false})
        this.todo=''
      }
      
    },
    RemoveText(key){
      this.list.splice(key,1)
    }

  }
}
</script>
<style>
ul li{
list-style-type:none;
}
.finish{
 background-color: #eee
}
</style>